B60W2510/184

Brake temperature and turnaround time estimation systems and methods
11407397 · 2022-08-09 · ·

A method for cooling a brake system is disclosed. In various embodiments, the method includes determining a turnaround time parameter; determining a time to cool parameter; determining a parameter difference between the time to cool parameter and the turnaround time parameter; and adjusting a flow of air directed at the brake system based on the parameter difference.

Traveling control apparatus

A traveling control apparatus includes: an information obtainer configured to obtain braking state information of a braking device in the host vehicle; and an ACC-ECU configured to execute traveling control including constant speed traveling control to cause the host vehicle to travel at a constant speed based on a preset vehicle speed, and follow-up traveling control to cause the host vehicle to travel so as to follow another vehicle traveling ahead of the host vehicle at a predetermined inter-vehicle distance. The ACC-ECU deactivates the ACC at a time when a braking performance index EV1z, derived from braking state information obtained by the information obtainer while the ACC being in operation, is deemed to be decreased by more than a predetermined first variation width IN_dif1, as compared with a braking performance index EV1a at a time of the ACC having been activated.

VEHICLE ONE PEDAL DRIVE GRADE COMPENSATION SYSTEM

A vehicle includes a gear selector that selects between a drive and reverse gear. The gear selected defines an intended travel direction. The vehicle also includes a controller that, responsive to user input, activates a one-pedal drive system, and responsive to detecting the vehicle is rolling back for more than a predefined time period, a feedforward road grade compensation torque being opposite to the intended travel direction and having a magnitude greater than a feedforward threshold, and a feedback data noise compensation torque in the intended travel direction having a magnitude greater than a feedback threshold, reduces the maximum magnitude of the feedforward road grade compensation torque to a predefined value throughout a current key cycle for the vehicle.

Vehicle one pedal drive grade compensation system

A vehicle includes a gear selector that selects between a drive and reverse gear. The gear selected defines an intended travel direction. The vehicle also includes a controller that, responsive to user input, activates a one-pedal drive system, and responsive to detecting the vehicle is rolling back for more than a predefined time period, a feedforward road grade compensation torque being opposite to the intended travel direction and having a magnitude greater than a feedforward threshold, and a feedback data noise compensation torque in the intended travel direction having a magnitude greater than a feedback threshold, reduces the maximum magnitude of the feedforward road grade compensation torque to a predefined value throughout a current key cycle for the vehicle.

BRAKING FORCE CONTROL SYSTEM, DEVICE, AND METHOD

A vehicular breaking force control system that includes a control device including a processor that acquires a plurality of longitudinal accelerations from a driving assistance system, and calculates a driving/braking request when the vehicle is in a coasting state in which an acceleration operation or a deceleration operation are not performed during running of the vehicle. The processor further acquires a driving force lower limit set for a powertrain actuator having a set gear ratio, and distributes the driving/braking request to at least one of (i) a powertrain system including the powertrain actuator and (ii) a brake system including a brake actuator. The driving/braking request is distributed to the at least one of the powertrain system and the brake system based on the acquired driving force lower limit.

BRAKE TEMPERATURE AND TURNAROUND TIME ESTIMATION SYSTEMS AND METHODS
20210107441 · 2021-04-15 · ·

A method for cooling a brake system is disclosed. In various embodiments, the method includes determining a turnaround time parameter; determining a time to cool parameter; determining a parameter difference between the time to cool parameter and the turnaround time parameter; and adjusting a flow of air directed at the brake system based on the parameter difference.

Braking force control system, device, and method

A vehicular breaking force control system includes: a plurality of actuators capable of generating a braking force for a vehicle; a coasting state detection unit configured to detect that a coasting state has been established; a target braking force calculation unit configured to calculate a target braking force on the basis of a state of the vehicle when the coasting state detection unit detects that the coasting state has been established; and a braking force distribution control unit configured to determine a distribution braking force that is a braking force to be caused to be generated by each actuator, such that the distribution braking force is equal to or less than a braking force generable by the actuator and a sum of the distribution braking forces is equal to the target braking force, and to perform control of causing each actuator to generate the distribution braking force.

TRAVEL CONTROLLER

A travel controller including an information acquisition part configured to acquire brake state information of a braking device of a host vehicle and an ACC-ECU configured to perform travel control, wherein the travel control includes constant speed travel control and headway travel control. The constant speed travel control is configured to control the host vehicle to travel at constant speed in accordance with a preset target vehicle speed. The headway travel control is configured to control the host vehicle to travel by following another vehicle travelling ahead so that a predetermined inter-vehicle distance in maintained with the other vehicle and the host vehicle travels in accordance with the target vehicle speed. In the ACC-ECU, when a braking performance index of the host vehicle has a “declined value”, a target acceleration of Example 1 takes a reduced value compared to the target acceleration of Comparative Example for a common distance difference.

Control device for vehicle

A control device for a vehicle capable of operating in an automated driving mode for automatically controlling at least the accelerating/decelerating control of the steering control and the accelerating/decelerating control of a vehicle includes: a route information acquisition unit; and an automated driving control unit that decides an action plan on a basis of map information, the action plan includes a target vehicle speed sequence that defines a target vehicle speed at the respective predetermined points at least on a road along which the vehicle will travel next, and the automated driving control unit calculates requested braking force that is braking force for decelerating the vehicle to target vehicle speed when the target vehicle speed is achieved by deceleration, calculates a predicted temperature of a brake device when the requested braking force is achieved, and decides a utilization proportion of the brake device for the requested braking force.

BRAKE POWER DERATING
20210122347 · 2021-04-29 · ·

A braking system is disclosed. The braking system may include a controller configured to determine a power limit for one or more brakes of a machine based on a temperature of the one or more brakes during engagement of the one or more brakes according to a commanded power. The power limit may be a power at which the temperature of the one or more brakes ceases to increase. The controller may be configured to determine a speed adjustment for the machine based on the power limit and the commanded power, and cause adjustment to a speed of the machine based on the determined speed adjustment.